I wonder if downloadable ROMs, scripts and code could be getting labelled as malware because they were created on Linux rather than Windows machines?

I ask this because I created a spreadsheet template with Hancomm Word on my Zaurus, and when I emailed it to a friend, her Windoze machine refused to let her write to it, saying it contained malware! If they are going to label Linux created files and binaries as malware, I am not sure what can be done about that.